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Dmitrij [34]
3 years ago
11

When a warm front passes your location, the temperature rises rapidly. As a result, air density:

Chemistry
2 answers:
sukhopar [10]3 years ago
8 0
The air density decreases.
deff fn [24]3 years ago
3 0

Answer:

decreases

Explanation:

As you know when the temperature of a medium decreases, the density increases, the majority of the solids present in nature depende of a certain temperature, when they heat up they tend to go to a liquid form and then to gas, so if the temperature in the are rises rapidly the densitiy of the air would decrease as it is expanding because of the rise of the temperature.

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Which is characteristic of reliable experimental results?
storchak [24]

Answer:

B. The data were reproduced by other scientists using the same experimental methods.  

Explanation:

One of the features of reliable experimental results is their reproducibility — other scientists must be able to produce them.  

A. is wrong. An experiment that is designed to prove a hypothesis is biased.

C. is wrong. A conclusion based on a single experiment is suggestive but not conclusive. It takes a number of experiments to provide a strong statistical relation between the variables.

D. is wrong.  The data may support a conclusion that the they reached using logic and critical thinking, but there may still be a flaw in the thinking, which other scientists can point out.  

7 0
3 years ago
2.643 grams of potassium butanoate (KCH3(CH2)2CO2 ) is fully dissolved in 50.00 mL of water, which is carefully transferred to a
lara [203]

Answer:

The pH of the solution is 4.69

Explanation:

Given that,

Mass of potassium = 2.643 grams

Weight of water = 50.00 mL

Weight of HCl=100.00 ml

Mole = 0.120 M

We know that,

KCH_{3}(CH_{2})_{2}CO_{2} is a basic salt.

Let's write it as KY.

The acid HCH_{3}(CH_{2}CO_{2}) would become HY.

We need to calculate the moles of KY

Using formula of moles

moles\ of\ KY=\dfrac{m}{M}\times1000

moles\ of\ KY=\dfrac{2.643}{126}\times1000

moles\ of\ KY=20.97\ m\ mole

The reaction is

KY+HCl\Rightarrow HY+ KCl

The number of moles of KY is 20.98 m

initial moles = 20.98

Final moles m=20.98-0.120\times100= 8.98

We need to calculate the value of pKa(HY)

Using formula for pKa(HY)

pKa_{HY}=-log Ka

pKa_{HY}=-log(1.5\times10^{-5})

pKa_{HY}=4.82

We need to calculate the pH of the solution

Using formula of pH

pH=pKa+log(\dfrac{[KY]}{[KH]})

Put the value into the formula

pH=4.82+log(\dfrac{8.98}{12})

pH=4,69

Hence, The pH of the solution is 4.69

7 0
3 years ago
What Is Ethane? Can you help me?
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Ethane is gas used as fuel: a colorless odorless gas that is highly flammable.

I hope this answered your question
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2 years ago
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Explain Isomerism of Alkanols
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When a carbon is bonded to more than two other carbons, a branch is formed. The smallest branched alkane is isobutane. Notice that isobutane has the same molecular formula, C4H10, as n-butane but has a different structural formula. Two different molecules which have the same molecular formula are isomers.
4 0
3 years ago
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